UNIVERSAL OFFICE CHAIR CASTERS: The office chair casters are made of premium rubber, the wheels fit most standard 2-inch 5-wheel office chairs. Fits most standard stem sizes, it is not applicable with IKEA chairs. HEAVY DUTY CASTERS: The heavy-duty construction supports up to a 60 lbs capacity as a set of 5, the support legs provide long-lasting durability, you will be able to enjoy it for many years. SMOOTH SILENCE: Precision ball bearings in the caster bracket and axle provide smooth, easy rolling. Enjoy smooth rolling with our swivel casters. No need to worry about disturbing your family, colleagues, and others. PROTECTS YOUR FLOOR: These replacement office chair wheels are used to protect hardwood floors, laminate, tile, slate, and all other hard floors from damage. Note: Not recommended for thick/high carpets. EASY TO INSTALL: The installation step is particularly simple, without using tools, simply pull off old casters from your office chair, then insert the new casters firmly and make sure they are secure. Size: installation height 63 mm Wheel diameter 50 mm Circle bracket height 11 * 22 mm Package included 5 pcs * Office Chair Wheels